feat(freelancer-directory): CSV wire shape for languages/specialities, wire the quote route, add invite-a-friend

- languages/specialities now POST as comma-separated STRINGS ("English,German"),
  not arrays; the build script splits them into separate filter options and tags.
- the client request form is no longer inert: it posts to odoo_experts_quote with
  an explicit freelancer pick-list (never an implicit all) and a client address.
- new invite-a-friend form posts to odoo_experts_invite_friend (sender name +
  friend email); we send the invitation, not the sender's address.
- both new forms show success only on a returned 200 (n8n answers 200 before the
  workflow runs) and promise no timing.
- build-directory.py: render the pick-list, fix the country option casing.
- pages stay drafts (noindex, not in sitemap/llms, no inbound links).

odoo-community-developers/admin/index.html

@@ -324,7 +324,10 @@
       var ODOO_EXPERTS_WEBHOOK =
         "https://n8n.odoo4projects.com/webhook/ODOO4projects/odoo_experts";
 
-      var MULTI_FIELDS = ["languages", "specialities", "odoo_versions"]; // comma-separated → array
+      var MULTI_FIELDS = ["odoo_versions"]; // comma-separated → array
+      // `languages` and `specialities` are COMMA-SEPARATED STRINGS on the wire
+      // ("English,German"), NOT arrays. `odoo_versions` stays an array.
+      var CSV_STRING_FIELDS = ["languages", "specialities"];
       var BOOL_FIELDS = ["OCA_member", "is_individual"];
       var NUM_FIELDS = ["odoo4projects_clients"];
       var TEXT_FIELDS = [
@@ -456,6 +459,19 @@
             return;
           }
 
+          if (CSV_STRING_FIELDS.indexOf(name) !== -1) {
+            // Normalise to the wire shape: trim each entry, drop blanks, re-join.
+            var norm = (els[0].value || "")
+              .split(",")
+              .map(function (s) {
+                return s.trim();
+              })
+              .filter(Boolean)
+              .join(",");
+            if (norm) payload[name] = norm; // an empty box must not wipe the field
+            return;
+          }
+
           if (BOOL_FIELDS.indexOf(name) !== -1) {
             var box = els[0];
             if (withId && box.dataset.loaded !== undefined) {